2. Gradient Smart Button
Button with Gradient Color
This buttons allows you to create gradients that flip, fill in, zoom in/out, etc.  Above is an example of the button filling in the top color when hovered.
3. Marketing Styles Button
Button needs two lines of text
Use this button if you need two rows of text. It even allows you to have a different font style on the 2nd row. Hover over does allow movement, but not color change.
This is the only button that allows a gradient from left/right.
4. Dual Button
Either/Or/And...
Each side of this button links to a different URL. The buttons can be separate, or can be joined with some text or icons. Gradient color is possible.